RMS5-2RS Sealed Ball Bearing 5/8" x 1 13/16" x 5/8" inch RMS5-2RS Sealed Ball Bearing, Bearing is radial deep groove ball bearing, RMS5-2RS bearing is made of Chrome Steel with chrome steel balls and steel cage, RMS5-2RS bearing is closed with rubber seals to protect the bearing from dust or any possible contamination, RMS5-2RS bearing is sealed and self lubricated, RMS5-2RS inner diameter is 5/8" inch, RMS5-2RS outer diameter is 1 13/16" inch and the RMS5-2RS width is 5/8" inch, the quality is set to EMQ (electric motor quality) to ensure high speed, RMS5-2RS bearing is lubricated with grease.